Hot rolling technology for rails is an important metal processing process widely used in the railway transportation industry. The following is a detailed introduction to hot rolling technology for rails:
1. Basic principles of hot rolling technology
Hot rolling refers to the rolling process carried out above the recrystallization temperature of metal materials. For rails, this process heats the steel billet at high temperature to achieve the optimal state of plastic deformation, and then uses a rolling mill to apply pressure to the steel billet to roll it into a rail with a specific geometric shape and size.
Main steps:
Heating: Place the steel billet in a heating furnace and heat it to about 1200°C to ensure that it has good plasticity.
Rough rolling: After preliminary rolling, an intermediate product close to the final shape is formed.
Finishing rolling: Further rolling to achieve precise size and shape requirements.
Cooling: Control the cooling rate to prevent internal stress and ensure stable performance of the rail.
Straightening and inspection: Finally, the rail is straightened and a comprehensive quality inspection is carried out.